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The genesis of two Picea-Cladina forests in northern Sweden

Hornberg, Ostlund, Zackrisson, Bergman
In northern Fennoscandia a rare forest type, characterized by Cladina [Cladonia] spp. (lichens) and Picea abies, occurs on dry productive sites outside the range of permafrost but close to the Scandes mountains. The history of vegetation development…
Type: Document
Year: 1999

Archaeological evidence on the diffusion and evolution of maize in northeastern Mexico

Mangelsdorf, MacNeish, Galinat
[no description entered]
Type: Document
Year: 1956

Archaeological evidence on the evolution of maize in northwestern Mexico

Mangelsdorf, Lister
[no description entered]
Type: Document
Year: 1956

Estimates of teosinte introgression in archaeological maize

Galinat, Mangelsdorf, Pierson
[no description entered]
Type: Document
Year: 1956

Fire as the first great force employed by man

Stewart
From the text...'The unrestricted burning of vegetation appears to be a universal culture trait among historic primitive peoples and therefore was probably employed by our remote ancestors. Archeology indicates that extensive areas of the Old and…
Type: Document
Year: 1956